“Along with buckets of money — more than $1.6 billion so far, worldwide — and a couple of Golden Globes, James Cameron’s “Avatar” has collected a smattering of controversy. Some of the hue and cry has involved matters of political allegory and theological implication, as pundits have divined that this globally popular blockbuster may represent a veiled ideological attack on America, capitalism, humanity, monotheism or all of the above. But the fiercest attack on “Avatar” has focused on what may seem, compared to such lofty matters, like a minor detail. Of all the corny lines and ready-made catchphrases in Mr. Cameron’s script, perhaps none has turned out to be so provocative as one uttered by Grace Augustine, the scientist played by Sigourney Weaver: “Where’s my damn cigarette?””